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http://dx.doi.org/10.5139/JKSAS.2008.36.2.156

Static Aeroelastic Analysis of Hingeless Rotor System in Hover Using Free-Wake Method  

Yoo, Seung-Jae (한국과학기술원 항공우주공학과 대학원)
Lim, In-Gyu (한국과학기술원 항공우주공학과 대학원)
Lee, In (한국과학기술원 항공우주공학과)
Kim, Do-Hyung (한국항공우주연구원)
Kim, Doeg-Kwan (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.2, 2008 , pp. 156-162 More about this Journal
Abstract
The static aeroelastic analysis of composite hingeless rotor blades in hover was performed using free-wake method. Large deflection beam theory was applied to analyze blade motions as a one-dimension beam. Anisotropic beam theory was applied to perform a cross-sectional analysis for composite rotor blades. Aerodynamic loads were calculated through a three-dimensional aerodynamic model which is based on the unsteady vortex lattice method. The wake geometry in hover was described using a time-marching free-wake method. Numerical results of the steady-state deflections for the composite hingeless rotor blades were presented and compared with those results based on two-dimensional quasi-steady strip theory and prescribed wake method. It was shown that wakes affect the steady-state deflections.
Keywords
Static Aeroelastic; Large deflection beam; Hingeless Rotor; Free-Wake;
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  • Reference
1 Cho, B.G., "Aeroelastic Analysis of Composite Hingeless Rotor Blades in Hover Using 3-D Aerodynamics", Master's Thesis, KAIST, 2002
2 Scully, M.P., "Computation of Helicopter Rotor Wake Geometry and Its Influence on Rotor Harmonic Airloads", MIT ASRL TR 178-1, March 1975
3 Lee, D.J. and Na, S.U., "Numerical Simulations of Wake Structure Generated by Rotating Blades Using a Time Marching, Free Vortex Blob Method", European Journal of Mechanics-B/Fluids, Vol.18, No. 1, 1999
4 Caradona, F.X., and Tung, C., "Experimental and Analytical Studies of a Helicopter Rotor in Hover", NASA TM-81232, 1981
5 Muller, R. H.G., "Special Vortices at a Helicopter Rotor Blade", Journal of the American Helicopter Society, Vol. 35, October 1990, pp.16-21   DOI
6 Kocurek, J.D. and Tangler, J.L., "A Prescribed Wake Lifting Surface Hover Performance Analysis", the 32nd Annual National Forum of the American Helicopter Society, May 1976, pp.24-35
7 Cho, M.H., "Aeroelastic Analysis of Hingeless Rotor Blades Using Refined Structural and Aerodynamic Models", Doctor's Thesis, KAIST, 1994
8 Atilgan, A.R. and Hodges, D.H., "Unified Nonlinear Analysis for Nonhomogeneous Anisotropic Beams with Closed Sections", AIAA Journal, Vol.29, No.11, 1991, pp.1990-1999   DOI
9 Bauchau, O.A. and Hong, C.H., "Nonlinear Composite Beam Theory", ASME Journal of Applied Mechanics, Vol. 55, 1988, pp.156-163   DOI
10 Kim, J.M., Komerath, N. M. and Liou, S. G., "Vorticity Concentration at the Edge of the Inboard Vortex Sheet", Journal of the American Helicopter Society, Vol. 39, No. 2, April 1994, pp.30-34   DOI
11 Clark, D.R. and Leiper, A.C., "The Free Wake Analysis; a Method for the Prediction of Helicopter Rotor Hoving Performance", the 25th Annual National Forum of the American Helicopter Society, May 1969, pp.3-11
12 Hodges, D.H., "Nonlinear Equations for the Dynamics of Pretwisted Beams Undergoing Small and Large Rotations", NASA TP-2470, 1985
13 Jeon, S.M., Cho, M.H. and Lee, I.,"Static and Dynamic Analysis of Composite Box Beams Using Large Deflection Theory", Computer and Structures, Vol. 57, 1988, pp. 156-163
14 Landgrebe, A.J., "The Wake Geometry of a Hovering Helicopter Rotor and its Influence on Rotor Performance", the 28th Annual National Forum of the American Helicopter Society, May 1972, pp. 3-15